CT scan of Tiktaalik roseae's fin skeleton
A computed tomography scan of the late Devonian Tiktaalik roseae's fin skeleton showing its dorsal rays (yellow) and ventral rays (cyan).
[Research supported by National Science Foundation grants EAR 0207721, EAR 0544093, EAR 0208377 and EAR 0544565.]
Learn more about this research in the University of Chicago news story How fish fins evolved just before the transition to land. (Date image taken: unknown; date originally posted to NSF Multimedia Gallery: March 25, 2020)
Credit: Tom Stewart
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